JP3233096U - Vehicle sun visor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sun visor which can be attached to at least a part of a front window of a vehicle and can suppress light entering from the front. SOLUTION: A sun visor is formed by laminating a plurality of films 2, has a plurality of strip-shaped slit glass regions arranged at regular intervals, and is equipped with an optical sensor 3 for detecting the emitted light. It is configured to be transparent by applying a voltage to the visor area by the signal from the optical sensor. [Selection diagram] Fig. 1

Description

The present invention relates to a vehicle sun visor capable of preventing or suppressing glare caused by light shining from the front when driving a vehicle.

When driving a car, the morning sun shines brightly on a sunny day, and the setting sun shines brightly in the evening, which often makes it difficult to see the signal installed at the intersection. , I often have the experience that it is difficult to understand the car from the front. Also, at night, the light of the oncoming vehicle often gets into my eyes and makes me feel dazzling.
As described above, poor visibility from the front window has a great influence as a factor that hinders safe driving of the car.

By the way, the vehicle is equipped with a sun visor on the upper side of the front window, and when the driver shines bright light from the front window, the sun visor is tilted toward you to prevent the shining light from getting into your eyes. .. The sun visor is also attached to the passenger seat side so that each sun visor can be tilted toward you to block the light.

Various types of sun visors are known, but in general, they are configured so that they can swing around the axis and tilt down.
For example, the "vehicle awning device" according to Japanese Patent Application Laid-Open No. 2007-45188 can be used as a "sun visor" that blocks the glare of sunlight that hinders driving when the vehicle is running, and the sunlight shining from the front window when the vehicle is parked or stopped. It is a vehicle awning device that can also be used as a "sun shade" that blocks the temperature rise inside the vehicle.

The vehicle awning device includes a screen that can essentially cover the entire front window from the upper side to the lower side, and a winding device that can pull out the screen and wind it freely. The screen can be fixed after being pulled out to adjust the length of the screen steplessly or in multiple steps, which can replace the sun visor and cover the upper side of the front window essentially tightly over the entire width direction. It is configured to be able to

The "vehicle sun visor" according to JP-A-2021-4-1790 is a vehicle sun visor that can move a side light-shielding panel to a second light-shielding position with a simpler operation as compared with the prior art.
The vehicle sun visor has a front light-shielding panel that can be moved to a storage position facing the roof and a first light-shielding position facing the front window, and a second light-shielding position facing the storage position and the side window in the vehicle interior. It is equipped with a side light-shielding panel that can be moved to the front and an interlocking mechanism that links the front light-shielding panel and the side light-shielding panel. The interlocking mechanism can move the side light-shielding panel from the storage position to the second light-shielding position by moving the front light-shielding panel from the storage position to the first light-shielding position.
"Vehicle awning device" according to Japanese Patent Application Laid-Open No. 2007-45188 "Sun visor for vehicles" according to Japanese Patent Application Laid-Open No. 2021-41790

In this way, a sun visor is attached to the vehicle, and the light shining from the front window can be blocked by tilting the sun visor toward you. By the way, the conventional sun visor has to be operated by the driver by his / her own hand, which is dangerous on a road with heavy traffic, and when entering a dim tunnel, the sun visor is raised to the original. It will be necessary to return it to its position.
The problem to be solved by the present invention is this problem, and a vehicle sun visor that detects the light shining on the front window and automatically becomes cloudy without the driver's own operation is provided.

The sun visor according to the present invention is not a conventional manual type, but is configured to detect the light shining on the front window and convert at least a part of the front window into suri glass.
Therefore, it has an optical sensor that senses light, and is configured to convert transparent glass into suri glass by turning the voltage on and off in response to a signal from the optical sensor.

By the way, a resin film having a predetermined size (vertical and horizontal dimensions) is attached to the inner surface of the front window, and the resin film is partially provided with a region for suppressing light transmission. That is, not the entire area of the resin film, but the slit glass areas having a constant width are formed at predetermined intervals.
Here, the specific configuration for slicing the transparent glass will not be limited.

The vehicle sun visor according to the present invention can block the dazzling light shining from the front window by slicing a part of the front window. The vehicle has an optical sensor that detects light, and a resin film attached to the front window can suppress the transmission of light in response to a signal from the optical sensor.
The driver who drives the car does not need to operate the sun visor by hand and is automatically sliced. In addition, when entering a dim tunnel, the slicing is eliminated and it becomes transparent so that there is no obstacle to passing through the tunnel.

The sun visor according to the present invention can be easily configured in any vehicle by attaching a resin film to the front window. The resin film is not entirely sliced, but for example, a sun visor having a certain width of shaving is formed at predetermined intervals to facilitate operation and to take safety into consideration. It is configured as a visor.

An example in which a resin film that functions as a sun visor is attached to the front window. A specific example of a resin film provided with a plurality of strip-shaped slit glass regions. A specific example of the operating principle of the suri glass area that can shield light. A specific example showing the laminated structure of the resin film constituting the suri glass area.

FIG. 1 shows a case where the front is viewed from the driver side of the car. A large front window 1 is provided in front of the car, and in the morning and evening, sunlight may pass through the front window 1 and shine through it, making it difficult for the driver to see the front, and at intersections there is a signal. It can happen that you overlook it.
Conventionally, a sun visor is attached to the upper part of the front window 1 on the driver side and the passenger seat side, and the sun visor is tilted toward the front in order to block bright sunlight.
If you need a sun visor, not only the sunlight but also the headlights from oncoming vehicles will feel dazzling.

Therefore, instead of the conventional sun visor that is operated manually, the transmission of light is suppressed by detecting light and making it into a glass.
In FIG. 1, a resin film 2 is attached to the front surface of the front window 1, and the resin film 2 is converted to be vitrified. Then, an optical sensor 3 is attached to one corner, and the light inserted into the front window 1 can be detected by the optical sensor 3.
When the shining light is strong, the resin film 2 is sliced by the signal transmitted from the optical sensor 3.

However, the region to be sliced is not the entire resin film, but is limited to a strip-shaped region having a certain width, and the strip-shaped region functions as a transparent region.
FIG. 2 shows a partially enlarged view of the resin film 2, in which slit glass areas 4, 4, ... Of a constant width are provided at equal intervals. This type of resin film 2 has been known conventionally, and for example, "UMU film" of Nippon Sheet Glass Co., Ltd. can be used.

FIG. 3 is a schematic view of a UMU film, in which (a) is a state in which no voltage is applied, and liquid crystal molecules 5, 5 ... Represented as rod-shaped molecules are arranged along the inner wall of the capsule.
In this state, the light incident on the resin film 2 is refracted on the surface or inside of the capsule due to the difference in refractive index between the special polymer 6 and the liquid crystal molecule 5 and the birefringence of the liquid crystal molecule 5. As a result, the light cannot travel straight and is scattered, and the film looks opaque.

On the contrary, when a voltage is applied, the liquid crystal molecules 5 tend to line up parallel to the direction in which the voltage is applied as shown in FIG. 3 (b), so that the liquid crystal molecules 5 are arranged perpendicular to the electrodes. In such a lined state, the light does not scatter and goes straight. As a result, the film looks transparent.
The resin film 2 of the present invention can be constructed by using the above UMU film. However, the film is not limited to the film shown in the figure.

The UMU film is composed of a plurality of layers, and FIG. 4 shows a specific example thereof, and is composed of five layers. Plastic films 7 and 7 are provided on both outer surfaces, transparent conductive layers 8 and 8 are provided inside the plastic films 7, and a liquid crystal layer 9 is provided between the transparent conductive layers 8 and 8.
The enlarged cross section of this film layer is shown in FIG. 3, and the resin film 2 of the present invention uses the UMU film shown in FIG. 4 to form a plurality of slit glass regions at regular intervals.

Further, a light control film commercially available as a sun visor can also be used. The operating principle is similar to the above UMU film, but it becomes semi-opaque when the voltage is turned on, and becomes transparent when the voltage is turned off.
That is, when the voltage is OFF, innumerable liquid crystals scattered in the film are oriented in an equilibrium and become transparent. However, when the voltage is turned on, the innumerable liquid crystals scattered in the film are oriented disproportionately, the refractive coefficients of the liquid crystal and the polymer become inconsistent, and the incident light is scattered and semi-opaque. do.
Therefore, the handle is provided with a switch for turning the voltage on and off on the light control film.

1 Front window 2 Resin film 3 Optical sensor 4 Suri glass area 5 Liquid crystal molecule 6 Special polymer 7 Plastic film 8 Transparent conductive layer 9 Liquid crystal layer

Claims (4)

In a sun visor that can be attached to at least a part of the front window of a vehicle to suppress light entering from the front, the sun visor is composed of a plurality of films laminated and arranged at regular intervals. It has a strip-shaped visor glass-like region, and an optical sensor for detecting the incoming light is attached, and it is configured to be transparent by applying a voltage to the visor glass-like region by a signal from the optical sensor. A sun visor for vehicles that is characterized by the fact that it has been done. The strip-shaped shaving glass-like region has a structure in which five layers of films are laminated, and has a plastic layer on both outer surfaces, a transparent conductive layer inside, and a liquid crystal layer between the transparent conductive layers. The vehicle sun visor according to claim 1. In a sun visor that can be attached to at least a part of the front window of a vehicle to suppress light entering from the front, the sun visor has a dimming film and is scattered in the film when the voltage is OFF. If the innumerable liquid crystals are oriented in a balanced manner and become transparent and the voltage is turned on, the innumerable liquid crystals scattered in the film are oriented in an imbalanced manner, and the liquid crystals and the refractive index of the polymer do not match. A vehicle sun visor characterized in that the incident light is scattered and made semi-opaque. The vehicle sun visor according to claim 1, 2, or 3, wherein a switch for manually turning on and off the voltage applied to the sun visor is attached.

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